Lucius Padilla is the son of Byz-Lat Gangster Nero Padilla. He is a young boy with Spina Bifida due to being born when Nero and Lucius mother were Ex Junkies.
Lucius is introduced in Authority Vested when Nero and Jax Teller drive to Lucius hospital. He practices walking to his father, who presents to him a stuff rabbit toy for his hard work.
In Andre Pescare, Nero Introduces Lucius to his friend Gemma Teller Morrow.
Lucius returns in Straw where Nero and Gemma give him a watergun which he uses to get his friends wet.
Lucius is mentioned by Triad Leader Henry Lin who is at war with SAMCRO, warning Nero that if he doesn't deliver Jax to him, he would kill him and threatning to do the same with his son. He is shown to be safe with his father and playing chess with redwoody girls.
He is later mentioned torward the final episodes where Nero sells his piece of Diosa to Mayan Leader Marcus Alveraz for $150,000 so he could buy his uncle's farm in Norco where he and Lucius can live in peace with Nero's friends Wendy, Abel, and Thomas.